If you're a Nexus S 4G owner and you're wondering how to get your hands on Google Wallet and be the first nerd on the block to pay for espresso by tapping your phone, we've received a tip that a software update for the Nexus S 4G has begun rolling out (and will continue to do so over a 4 day period).

The update includes not only the official Google Wallet app, but also Google Shopper and various security patches. It looks like Sprint dealers will begin assisting customers with manually updating starting September 20th (tomorrow). If you're a user who hasn't yet received the Google Wallet app, don't worry - the wait is almost over.